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arXiv 1101.2649quant-ph
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通过光学重聚焦增强量子通信

Enhanced Quantum Communication via Optical Refocusing

Cosmo Lupo, Vittorio Giovannetti, Stefano Pirandola, Stefano Mancini, Seth Lloyd

摘要:

本文研究了由光重聚焦系统介导的量子通信问题,该系统被简化为一个具有有限光瞳的薄透镜。该模型捕捉了所有这些情况的基本特征,其中信号要么被中继器重新聚焦以进行长距离通信,要么在信息解码过程之前被聚焦在检测器上。介绍了线性光学系统的一般方法,计算了再聚焦装置的通信容量。虽然瞳孔的有限扩展可能会导致信息的丢失,我们表明,存在的重新聚焦系统可以大大提高可靠的通信速率相对于自由空间传播。

英文摘要:

We consider the problem of quantum communication mediated by an optical refocusing system, which is schematized as a thin lens with a finite pupil. This model captures the basic features of all those situations in which a signal is either refocused by a repeater for long distance communication, or it is focused on a detector prior to the information decoding process. Introducing a general method for linear optical systems, we compute the communication capacity of the refocusing apparatus. Although the finite extension of the pupil may cause loss of information, we show that the presence of the refocusing system can substantially enhance the rate of reliable communication with respect to the free-space propagation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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